Machine for charging furnaces



w. DYRSSEN. A MACHINE FOR CHARGING FURNACES.

f -PLICATION FILED SEPT-6,1917.

Patented Feb. 3,1920.

' 2 SHEETS-SHEET I INVENTOR W. DYHSSEN.

MACHINE FOR CHARGING FURNACES,

APPLXCATION FiLED SEPT.6, 1917 1,329,588. rammed Feb. 3,1920,

2 SHEETS SHEET 2.

%kl mflfjyfff fi, INVENTOR'. B J Homey J.

T UNITED err-tr es PATENT OFFICE.-

WALDEMAR DYBSSEN, OF NEW YORK, N. Y.

MACHINE FOB CHARGING FURNACES.

Specification of Letters Patent.

Patented Feb. 3, 1920.

Application filed September 6, 1917. Serial No. 190,072. v

To all whom it may concern:

Be it known that I, WALDEMAR Drnssnn, a subject of the King of Sweden, residing in the city, county, and State of New York, have invented a certain new and useful lmroved Machine for Charging Furnaces, of which the following is a specification.

In introducing charges into steel and other metallurgical furnaces it is customary to use a long narrow box which conveys the material into the furnace and is then turned on its longitudinal axis so as to dump the material. But with these machines it has been difficult or impossible to charge the ma terial evenly and to a uniform level over the I can be properly distributed and also cuts v down the expenditure and labor previously involved especially in charging electric furnaces.

The accompanying drawings illustrate embodiments of the invention.

Figure 1 is a horizontal section of a furnace and charging apparatus, chiefly diagrammatic;

Fig. 2 is a plan, and Fig. 3 a side elevation of a charging apparatus;

Fig. 8 is an enlargeddetail of ig. 3 in vertical section;

Figs. a and 5 are side elevations illustratingimodified forms.

eferring to Fig. 1, the furnace A is of circular shape with a spout B at the front and with a support C at the rear for the electrodes. It is supposed to be of the rolling type so that the furnace and support C together can be tilted forward to pour out the steel. But it is to be understood that the invention is applicable to various other types of electric furnaces and in fact to furnaces other than electric. The charging doors or doorways D are located at the sides. Generally. with this type of furnace they are ar ranged in batteries one alongside the other with their spouts all at the front for convenience in pouring into a ladle arranged have comparatively to run along the front of the battery of furnaces.

At E are charging boxes one of which is intended to be introduced through each of the two opposite side doors and to be swung back and forth into the dotted line positions shown before being inverted, so that the material may be dumped at considerable dis tances to the side of the doorways in order to secure a practically or nearly uniform distribution of material in the furnace.

in most of its details the charging machine may be made similar to thosenow in common use. As in the known charging machines, there is a hollow shaft F on the forward end of whichv is a head G adapted to be dropped into a socket H on the rear end of a box and then to be fastened by a lon central pin J, entering a hole in the end it. of the hot as shown in i 3. The

rear end of the pin J is shown in Fig. 3, er v tending out of the rear end of the shaft'or pole F and pirotally connected to a hand operated locking lcvcr ll of any usual or suitable type. is also usual, the shaft F is adapted to rotate in bearings M and N and carries on its rear end a hand wheel 0 by which it can be turned to dump the box.

The shaft is mounted on a carriage of some sort and withdrawn some distance outside of the furnace door. The loaded box is run on a truclr to a position approximately in front of the door. The end of the shaft is brought up to it and is lowered to bring its head G into the socket ll- The connection is then locked by the lower L, the shaft with its loaded box lifted to the level of the door, the

shaft on its carriage pushed inward until the box is within the furnace and the shaft then turned by the hand wheel 0 to dump the contents. The shaft andbox are then with drawn, the en pty box released and removed and the same operation repeated with the next box.

The carriage, according to Figs. 2 and 3, is in the form of a trolley P mounted on overhead rails Q so that it may be advanced and retracted toward and from the furnace. Th bearings M and N of the shaft are supported by ro s R and ti which are attached at their upper ends to an arm T which is pivotally suspended at its forward end ll from the forwardly projecting end V of the trolley. The swinging arm T is also supported through a roller V on a circular track X which is carried by the trolley and which has its center at the pivotal point of suspension of the arm T.

The axis Y of the rotation of the arm T and consequently of the shaft F is arranged at a point within the outer face of the furnace. By the use of the overhead suspension illustrated the pivotal axis Y can be placed at practically any desired point. To secure the greatest amplitude in swinging, the axis should be located, as indicated in .Fig. 1, midway between the outer face of the doorway and the inner face, or if the doorway should be flaring the axis may be shifted accordingly inward or outward to secure the maximum range of lateral movement of the box, and this can be determined easily by trial with the overhead carriage. The suspension rod R is connected directly to one arm Z of a bent lever which is mounted on the forward bearing M, and the other arm a of which is connected by a link 7) to an arm 0 pivoted on the rear bearing and carrying a toothed sector (I which engages a pinion e on the shaft of a motor f. The motor may then be operated to swing the lever Z a and thus to lift or lower the forward end of the shaft and the box sufficiently to carry the box at a level slightly above that of the charge already in the furnace. This location of th 'motor near the outer end of the shaft serves to counterbalance the weight of the box and its load.

Referring now to Fig. 4, this illustrates a construction of which the lower part is the same as in Fig. 3 and the swinging arm T is supported by a modified style of trolley. The trolley P in this case carries the pivot bolt g of a pivoted carriage it which carries the circular rail X and which at its forward projecting end pivotally supports the forward end of the arm T. The pivot bolt G is arranged as nearly as may be on the center line of the weight of the depending parts. The overhead track Q extends from above the side door D of one of the furnaces to a point over the adjacent side door of the next furnace, and the carriage and charging apparatus may be shifted to the left and used in the position of Fig. i to charge one furnac or shifted to the right and given half aoturn on the pivot bolt D and used for charging the adjacent furnace.

In Fig. 5 a modified form of trolley P is illustrated running on rails Q, Q supported by the columns j of the building, or by any suitable part of the structure. The pivoted carriage it and other parts in this figure are substantially the same as in Fig. l. lVhat I claim is:

A metallurgical furnace having a thick wall and a charging door through said wall of slight width compared with the width of the furnace in combination with an overhead support and a charging machine supported at two points therefrom, said support having a projecting nd with a vertical pivot about which the charging means swings, said support adapted to take a posi tion with said pivot passing rearwardly of the rear end of the charging box and within the outer face of the furnace doorway so as to permit the dumping of the charge at considerable distances beyond the sides of the --door.

In witness whereof, I have hereunto signed my name.

VVALDEMAR DYRSSEN. 

